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Electric working machine

A working machine and electric technology, applied in the direction of DC motor reduction gear, electric motor/converter plug, harvester, etc., can solve the problem of not being able to brake quickly

Active Publication Date: 2014-10-29
HITACHI KOKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since there is no brake provided for the rotation of the cutting blade, the brake cannot be applied quickly when the trigger switch is released

Method used

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  • Electric working machine
  • Electric working machine
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Examples

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no. 1 example

[0040] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals refer to the same elements, and detailed descriptions thereof will not be repeated. In addition, in this specification, front and back, left and right, and up and down directions will be described based on the directions shown in the drawings.

[0041] Such as figure 1 As shown, an electric bush cutter 1 as an example of an electric working machine includes: an operation unit 10 to which a battery pack 2 is attached; a retractable rod which is fixed to the vicinity of the front end of the operation unit 10; and a drive unit 151 to which is attached To the end of the rod; and the handle unit 41, which is fixed to the vicinity of the center of the rod in the front-rear direction. In the current embodiment, the contraction rod includes a fixed tube 40 and a movable tube 80. The movable tube 80 is connected to the front side of the ...

no. 2 example

[0081] In the following, we will refer to Picture 11 The circuit diagram according to the second embodiment of the present invention is described. The controller 301 according to the second embodiment is installed in image 3 On the circuit board 13 shown, the configuration or components other than the circuits mounted on the circuit board 13 are exactly the same as those described in the first embodiment. The controller 301 includes the same switch 21 as in the first embodiment, a main power switch circuit 214, a main power automatic stop circuit 203, a constant voltage circuit 207, a battery voltage detection circuit 235, a trigger detection circuit 240, and a microcomputer 211, and Therefore, repeated descriptions about its internal structure or behavior will be omitted. The output stop circuit 343 is mainly in accordance with the output stop circuit 243 of the first embodiment (see Figure 7 ) Operates in the same manner, that is, the output stop circuit 343 receives a sto...

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PUM

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Abstract

An electric working machine including: a motor; a driving unit configured to be driven by the motor; a trigger switch configured to allow rotation of the motor; a power supply unit configured to supply electric power to the motor; and a control unit configured to control rotation of the motor, characterized in that: the electric working machine further comprises a switching element configured to perform short-circuiting between terminals of the motor to apply electronic braking, wherein the control unit is configured to perform adjustment of the braking by controlling the switching element when stopping the motor.

Description

Technical field [0001] Aspects of the present invention relate to an electric working machine driven by a motor. Background technique [0002] As a working machine for cutting grass or plants, there is known a bush cutter in which a rotating blade is driven. Although bush cutters that use an internal combustion engine as a power source are generally used, recently, due to the improved performance of rechargeable batteries, electric bush cutters are actually and widely used. If electricity is used as the power source of the bush cutter, it has the characteristics of no noise and exhaust gas, and the operating cost is excellent. Patent Document 1 discloses such an electric bush cutter, in which the number of rotations of the motor can be adjusted. Will refer to Figure 17 The construction of such an electric bush cutter according to the prior art is described. In the electric bush cutter 1001 driven by the battery pack 1002, the motor unit 1004 is attached to the distal end of th...

Claims

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Application Information

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IPC IPC(8): H02P3/14
CPCH02P3/14A01D34/90H02P7/29H02P3/12
Inventor 中野恭嗣堀江由季富田博久船桥一彦
Owner HITACHI KOKI CO LTD
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